PRECISION MEASUREMENT OF THE MOMENTA OF CONVERSION ELECTRON LINES FROM SOURCES OF ²¹²Pb (ThB)

1 February 1965

journal article
Published by Canadian Science Publishing in Canadian Journal of Physics

Vol. 43 (2) , 171-192
https://doi.org/10.1139/p65-017

Abstract

Momentum ratios of some of the more intense internal conversion lines from sources of thorium radioactive deposit have been determined with accuracies of 1 to 4 parts in 10⁵ using an iron-free β spectrometer. Accurate absolute values of the momenta were obtained from intercomparisons of these line momenta with that of the K-412 internal conversion line in ¹⁹⁸Hg. The X-ray self-calibration method of Siegbahn is discussed in some detail and is shown to be less accurate at this time. The results are analyzed on both the 1955 and 1963 least-squares adjusted values of the fundamental constants.

Keywords

GAMMA EMISSION
MERCURY
MOMENTUM
INTERNAL CONVERSION
ELECTRON TRANSITIONS
THORIUM

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PRECISION MEASUREMENT OF THE MOMENTA OF CONVERSION ELECTRON LINES FROM SOURCES OF 212Pb (ThB)

Abstract

Keywords

PRECISION MEASUREMENT OF THE MOMENTA OF CONVERSION ELECTRON LINES FROM SOURCES OF ²¹²Pb (ThB)